shall descale
Regular verb: descale - descaled- descaled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'll descale
you'll descale
he'll descale
we'll descale
you'll descale
they'll descale 	I'll be descaling
you'll be descaling
he'll be descaling
we'll be descaling
you'll be descaling
they'll be descaling	I'll have descaled
you'll have descaled
he'll have descaled
we'll have descaled
you'll have descaled
they'll have descaled	I'll have been descaling
you'll have been descaling
he'll have been descaling
we'll have been descaling
you'll have been descaling
they'll have been descaling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shan't descale
you shan't descale
he shan't descale
we shan't descale
you shan't descale
they shan't descale 	I shan't be descaling
you shan't be descaling
he shan't be descaling
we shan't be descaling
you shan't be descaling
they shan't be descaling	I shan't have descaled
you shan't have descaled
he shan't have descaled
we shan't have descaled
you shan't have descaled
they shan't have descaled	I shan't have been descaling
you shan't have been descaling
he shan't have been descaling
we shan't have been descaling
you shan't have been descaling
they shan't have been descaling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shall I descale?
shall you descale?
shall he descale?
shall we descale?
shall you descale?
shall they descale? 	shall I be descaling?
shall you be descaling?
shall he be descaling?
shall we be descaling?
shall you be descaling?
shall they be descaling? 	shall I have descaled?
shall you have descaled?
shall he have descaled?
shall we have descaled?
shall you have descaled?
shall they have descaled? 	shall I have been descaling?
shall you have been descaling?
shall he have been descaling?
shall we have been descaling?
shall you have been descaling?
shall they have been descaling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shan't I descale?
shan't you descale?
shan't he descale?
shan't we descale?
shan't you descale?
shan't they descale? 	shan't I be descaling?
shan't you be descaling?
shan't he be descaling?
shan't we be descaling?
shan't you be descaling?
shan't they be descaling? 	shan't I have descaled?
shan't you have descaled?
shan't he have descaled?
shan't we have descaled?
shan't you have descaled?
shan't they have descaled? 	shan't I have been descaling?
shan't you have been descaling?
shan't he have been descaling?
shan't we have been descaling?
shan't you have been descaling?
shan't they have been descaling?